April Build - Lightmass Taking forever?

BradleyWascher

So I downloaded the new April UDK build and it seems to be taking forever to build the maps if at all, I wanted to do a simple test just 3 bsp with a dominant directional light and a light mass important volume, it never built... Is there some setting that can be reduced that could be causing this? Its stalling when trying to run lightmass. Any and all insight would be helpful, thanks.

Mik2121

Try making a Light Importance Volume.

http://www.chrisalbeluhn.com/UDK_Lightmass_Tutorial.html

Ctrl+F "Importance Volume" there and it will show you where to find it in case you don't know.

Otherwise, no idea. I'll check out the April build tonight and see what happens over here.

BradleyWascher

So, Ive tried a few different set ups and now it seems like I keep getting a lighting failed error, then the error report says, lights need rebuilt, not sure whats up but Ive never had an issue like this before.

// Even just a simple omni light with 3 bsp and a lightmass and it says lighting failed.

BeserK

I'm having a similar problem, since the April build of UDK, my lightmass calculations go on indefinitely.
It gets to the "processing mappings" section (Blue bar) and the bar carries on forever.
Reverted back to the previous build and it works fine... Bah!

BradleyWascher

Yeah I'm figuring this is just a glitch. I guess it's the march build for me till a update or may haha

Froyok

Yeah, there is some problem, but the Epic's staff can't find the problem currently :
http://forums.epicgames.com/showthread.php?t=772990

I don't have any problems, but I have an ATI card. What do you have ? I suspect (again) a problem with nvidia card...

BradleyWascher

Indeed, I have a 8800gtx nvidia

Dinky

I had the exact same issue the past few days.

There seemed to have been a problem with the UDK trying to lightmap onto one of my static meshes that had an emissive map applied to one of the UVs.

It doesn't sound like your scene had any emissives in it because you said it's just 3 bsps, but this seems to have solved the issue for me.

Jedah

Was this problem ever fixed? I am running a test on the April build of UDK right now and getting the same issue. Very simple room, One omni light and the default gun. Lightmass never complete building.

Should I just go back to the March build?

Sythen

UDK-2011-04>Engine>Config>BaseLightmass.ini under [DevOptions.PrecomputedDynamicObjectLighting] change: bUseMaxSurfaceSampleNum=True to bUseMaxSurfaceSampleNum=False Should sort you out =] Although I have seen some lighting anomalies as a result, I've brought back to the March build.